New to texturing, my leather texture is see-through
You didn't pack your textures, we cant troubleshoot material problems without all the relevant textures.

Anyway this doesn't look like a texture problem, not even material related.

You have lots of duplicated geometry and overlapping vertex in your mesh, there are double faces everywhere in your seat, and your.

Enter Edit Mode in each of your meshes, select everything then press W > Remove Doubles.

Be sure to recalculate normals afterwards by selecting everything and pressing Ctrl+N